:root{
  --red:#9b0000;--dark:#222b36;--line:#adb7c4;--light:#f3f5f8;
  --green:#dff4df;--yellow:#fff2bf;--danger:#ffd8d8;--blue:#e7f0fb;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#e9edf2;color:#17202b}
.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;background:var(--red);color:#fff;padding:16px 22px;position:sticky;top:0;z-index:20}
.brand{font-size:28px;font-weight:800}.subtitle{font-size:15px;margin-top:3px}
.header-status{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.badge{border-radius:14px;padding:6px 10px;background:#fff;color:#303944;font-size:12px;font-weight:700}.badge.warning{background:#ffe7a8}
.module-tabs{position:sticky;top:78px;z-index:19;display:flex;gap:6px;overflow-x:auto;background:#252f3b;padding:8px 14px}
.module-tabs button{min-height:40px;border:1px solid #647383;background:#fff;border-radius:4px;padding:7px 14px;font-weight:700;white-space:nowrap}
main{max-width:1500px;margin:14px auto;padding:0 12px 40px}
.sheet-section{background:#fff;border:1px solid #8f9aa7;margin:12px 0;padding:13px;box-shadow:0 1px 4px rgba(0,0,0,.08)}
.sheet-section h2{margin:-13px -13px 12px;padding:9px 12px;background:#dce3eb;border-bottom:1px solid #8f9aa7;font-size:19px}
.aircraft-grid,.baggage-grid{display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:9px}
label{display:grid;gap:4px;font-size:13px;font-weight:700}
input,select,button{font:inherit}
input,select{min-height:38px;border:1px solid #7d8793;border-radius:3px;padding:6px 8px;background:#fff}
.source-note{margin-top:10px;padding:8px;background:var(--blue);border-left:4px solid #4d78a8}
.table-wrap{overflow:auto;border:1px solid #8d97a4}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{border:1px solid #aab2bd;padding:6px 7px;text-align:left}
th{background:#e2e7ed;position:sticky;top:0}
.load-table td:nth-child(2){width:120px}.load-table input[type=number]{width:100%;min-width:82px}
.load-table td:last-child,.load-table th:last-child{text-align:center;width:85px}
input[type=checkbox]{width:26px;height:26px;min-height:auto;accent-color:#8f0000}
.results-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}
.result-card{border:2px solid #778391;padding:12px;background:#fafbfc}
.result-card h3{margin:0 0 8px}.primary{font-size:30px;font-weight:800}.landing-fuel{font-size:21px;font-weight:800;margin:5px 0}.margin{font-weight:700;margin-top:5px}
.status-line{margin-top:10px;padding:7px;text-align:center;font-weight:800;border-radius:3px}
.result-card.go .status-line{background:var(--green)}.result-card.no-go .status-line{background:var(--danger)}
.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}.chart-card{border:1px solid #929da9;padding:8px}.chart-card h3{text-align:center;margin:3px}
canvas{width:100%;height:auto;display:block;background:#fff}
.overall-banner{font-size:21px;font-weight:800;text-align:center;padding:11px;margin-top:12px;border:2px solid #75808c}
.overall-banner.go{background:var(--green);border-color:#3b7f43}.overall-banner.no-go{background:var(--danger);border-color:#a40000}
details{margin-top:10px}pre{white-space:pre-wrap;max-height:400px;overflow:auto;background:#111;color:#eaf0f4;padding:10px}
.quick-controls{display:grid;grid-template-columns:minmax(160px,1fr) minmax(140px,1fr) auto;gap:9px;align-items:end}
.primary-button{min-height:44px;background:#8f0000;color:#fff;border:0;border-radius:4px;padding:8px 16px;font-weight:800}
.quick-summary{margin:11px 0;padding:10px;background:var(--blue);font-weight:700}
.status-pass{background:var(--green);font-weight:800}.status-fail{background:var(--danger);font-weight:800}
.best-position{outline:3px solid #247b31;outline-offset:-3px}
.section-intro{margin-top:0}footer{text-align:center;padding:18px;color:#596572}
@media(max-width:900px){
 .aircraft-grid,.baggage-grid{grid-template-columns:repeat(2,1fr)}
 .results-grid,.chart-grid{grid-template-columns:1fr}
 .quick-controls{grid-template-columns:1fr 1fr}.quick-controls button{grid-column:1/-1}
 .topbar{position:static}.module-tabs{top:0}
}
@media(max-width:600px){
 main{padding:0 6px}.sheet-section{padding:10px;margin:8px 0}
 .aircraft-grid,.baggage-grid,.quick-controls{grid-template-columns:1fr}
 .brand{font-size:23px}.topbar{padding:12px;align-items:flex-start}
 .header-status{justify-content:flex-end}
 input,select,button{min-height:48px;font-size:16px}
 .module-tabs button{min-height:48px}
}